Reduced conditioned fear response in mice that lack Dlx1 and show subtype-specific loss of interneurons / R. MAO in Journal of Neurodevelopmental Disorders, 1-3 (September 2009)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 1-3 (September 2009) . - p.224-36 Titre : Reduced conditioned fear response in mice that lack Dlx1 and show subtype-specific loss of interneurons Type de document : Texte imprimé et/ou numérique Auteurs : R. MAO, Auteur ; Damon T. PAGE, Auteur ; I. MERZLYAK, Auteur ; C. KIM, Auteur ; L. H. TECOTT, Auteur ; P. H. JANAK, Auteur ; J. L. RUBENSTEIN, Auteur ; M. SUR, Auteur Article en page(s) : p.224-36 Langues : Anglais (eng) Mots-clés : Associative learning  Behavior  Calretinin  Fear conditioning  GABAergic  Hyperactivity  Inhibitory  Interneuron  Neuropsychiatric disease  Prepulse inhibition Index. décimale : PER Périodiques Résumé : UNLABELLED: The inhibitory GABAergic system has been implicated in multiple neuropsychiatric diseases such as schizophrenia and autism. The Dlx homeobox transcription factor family is essential for development and function of GABAergic interneurons. Mice lacking the Dlx1 gene have postnatal subtype-specific loss of interneurons and reduced IPSCs in their cortex and hippocampus. To ascertain consequences of these changes in the GABAergic system, we performed a battery of behavioral assays on the Dlx1 mutant mice, including zero maze, open field, locomotor activity, food intake, rotarod, tail suspension, fear conditioning assays (context and trace), prepulse inhibition, and working memory related tasks (spontaneous alteration task and spatial working memory task). Dlx1 mutant mice displayed elevated activity levels in open field, locomotor activity, and tail suspension tests. These mice also showed deficits in contextual and trace fear conditioning, and possibly in prepulse inhibition. Their learning deficits were not global, as the mutant mice did not differ from the wild-type controls in tests of working memory. Our findings demonstrate a critical role for the Dlx1 gene, and likely the subclasses of interneurons that are affected by the lack of this gene, in behavioral inhibition and associative fear learning. These observations support the involvement of particular components of the GABAergic system in specific behavioral phenotypes related to complex neuropsychiatric diseases. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11689-009-9025-8) contains supplementary material, which is available to authorized users. En ligne : http://dx.doi.org/10.1007/s11689-009-9025-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=341 [article] Reduced conditioned fear response in mice that lack Dlx1 and show subtype-specific loss of interneurons [Texte imprimé et/ou numérique] / R. MAO, Auteur ; Damon T. PAGE, Auteur ; I. MERZLYAK, Auteur ; C. KIM, Auteur ; L. H. TECOTT, Auteur ; P. H. JANAK, Auteur ; J. L. RUBENSTEIN, Auteur ; M. SUR, Auteur . - p.224-36. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 1-3 (September 2009) . - p.224-36 Mots-clés : Associative learning  Behavior  Calretinin  Fear conditioning  GABAergic  Hyperactivity  Inhibitory  Interneuron  Neuropsychiatric disease  Prepulse inhibition Index. décimale : PER Périodiques Résumé : UNLABELLED: The inhibitory GABAergic system has been implicated in multiple neuropsychiatric diseases such as schizophrenia and autism. The Dlx homeobox transcription factor family is essential for development and function of GABAergic interneurons. Mice lacking the Dlx1 gene have postnatal subtype-specific loss of interneurons and reduced IPSCs in their cortex and hippocampus. To ascertain consequences of these changes in the GABAergic system, we performed a battery of behavioral assays on the Dlx1 mutant mice, including zero maze, open field, locomotor activity, food intake, rotarod, tail suspension, fear conditioning assays (context and trace), prepulse inhibition, and working memory related tasks (spontaneous alteration task and spatial working memory task). Dlx1 mutant mice displayed elevated activity levels in open field, locomotor activity, and tail suspension tests. These mice also showed deficits in contextual and trace fear conditioning, and possibly in prepulse inhibition. Their learning deficits were not global, as the mutant mice did not differ from the wild-type controls in tests of working memory. Our findings demonstrate a critical role for the Dlx1 gene, and likely the subclasses of interneurons that are affected by the lack of this gene, in behavioral inhibition and associative fear learning. These observations support the involvement of particular components of the GABAergic system in specific behavioral phenotypes related to complex neuropsychiatric diseases. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11689-009-9025-8) contains supplementary material, which is available to authorized users. En ligne : http://dx.doi.org/10.1007/s11689-009-9025-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=341

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